<template>
  <div class="home-container">
    <!-- 顶部导航栏组件 -->
    <van-nav-bar class="page-nav-bar" fixed>
      <van-button class="search-btn" slot="title" type="info" size="small" round icon="search" to="/search">搜索</van-button>
    </van-nav-bar>
    <!-- 频道列表 -->
    <van-tabs class="channel-tabs" v-model="active" swipeable animated>
      <van-tab :title="item.name" v-for="item in channels" :key="item.id">

        <article-list :channels="item"/>
      </van-tab>
         
      <div slot="nav-right" class="placeholder"></div>
      <div slot="nav-right" class="hamburger-btn" @click="isshow=true">
       <i class="toutiao toutiao-gengduo"></i>
     </div>
    </van-tabs>
    <!-- 通道列表 -->
    <!-- 频道编辑弹出层 -->
    <van-popup
      v-model="isshow"
      closeable
      close-icon-position="top-left"
      position="bottom"
      :style="{ height: '100%' }"
    >
    <channel-edit 
    :my-channels="channels"
    :active="active"
    @update-active="onUpdateActive"
    />
    </van-popup>
  </div>
</template>

<script>
import {getUserChannels} from '@/api/user'
import ArticleList from './components/article-list.vue'
import ChannelEdit from './components/channel-edit.vue'
import {mapState } from 'vuex'
import {getItem} from '@/utils/user'
export default {
  name: 'home', 
  data() {
    return {
       active: 0,
       channels:[],
       isshow:false
    }
    
  },
  components: {
    ArticleList,
    ChannelEdit
  },
  computed:{
   ...mapState(['user'])
  },
  created(){
    this.loadChannels()
    
  },
  methods: {
    async loadChannels(){ 
      try {
      //  const {data} = await getUserChannels()
      // //  console.log(data); //每一项数据
      //   this.channels = data.data.channels
      let channels = []
      if(this.user){
        //已登录 获取用户频道
        const {data} = await getUserChannels()
        channels = data.data.channels
      } else {
        //未登录 判断是否有本地存储
       
        const localChannels = getItem('TOUTIAO_CHANNELS')
         //有拿过来使用
        if(localChannels){
          channels = localChannels
        } else {
          //没有 请求获取默认列表
          const {data} = await getUserChannels()
        channels = data.data.channels
          
        }
        
      }
      this.channels = channels
        // console.log(channels);
      }catch(err){
        this.$toast('数据获取失败')
      }
      
     
    },
    onUpdateActive(index,isshow = true){
      this.active = index
      //关闭编辑频道
      this.isshow = isshow

    }
  },
  
}
</script>

<style scoped lang="less">
.home-container {
  padding-top: 174px;
  padding-bottom: 100px;
  /deep/ .van-nav-bar__title {
    max-width: unset;
  }
  .search-btn {
    width: 555px;
    height: 64px;
    background-color: #5babfb;
    border: none;
    font-size: 28px;
    .van-icon {
      font-size: 32px;
    }
  }
}
/deep/ .channel-tabs {
  .van-tabs__wrap {
    position: fixed;
    top: 92px;
    z-index: 1;
    left: 0;
    right: 0;
    height: 82px;

  }

  .van-tab {
    min-width: 200px;
    border-right: 1px solid #edeff3;
    font-size: 30px;
    color: #777777;
  }

  .van-tab--active {
    color: #333333;
  }

  .van-tabs__nav {
    padding-bottom: 0;
  }

  .van-tabs__line {
    bottom: 8px;
    width: 31px !important;
    height: 6px;
    background-color: #3296fa;
  }
}.hamburger-btn {
  position: fixed;
  right: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  width: 66px;
  height: 82px;
  background-color: #fff;
  opacity: 0.902;

  i.toutiao {
    font-size: 33px;
  }
}.hamburger-btn {
  position: fixed;
  right: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  width: 66px;
  height: 82px;
  background-color: #fff;
  opacity: 0.902;

  i.toutiao {
    font-size: 33px;
  }

  &:before {
    content: '';
    position: absolute;
    left: 0;
    width: 1px;
    height: 100%;
    background-image: url(~@/assets/gradient-gray-line.png);
    background-size: contain;
  }
   .placeholder {
     flex-shrink: 0;
     width: 66px;
     height: 82px;
   }
   
   .hamburger-btn {
     position: fixed;
     right: 0;
     display: flex;
     justify-content: center;
     align-items: center;
     width: 66px;
     height: 82px;
     background-color: #fff;
     opacity: 0.902;
   
     i.toutiao {
       font-size: 33px;
     }
   
     &:before {
       content: '';
       position: absolute;
       left: 0;
       width: 1px;
       height: 100%;
       background-image: url(~@/assets/gradient-gray-line.png);
       background-size: contain;
     }
   }
}
</style>